Question

how much heat is needed to raise the temperature of a 20kg vat made of iron and filled with 3kg of water from 10°c to 90°c. take the Cp of iron and water to be 450J/kg.°c and 4186J/kg.°c respectively. ​

Answer 1

Answer:

Given:

mass(m)=1kg

Heat energy required (Q)=?

Rise in temperature Δt=100−20=80

∘

C=80K

Specific heat capacity (c) 483Jkg

−1

K

−1

Specific heat capacity (c) =

Mass(m)×Riseintemperature

Heatenergy(Q)

483=Q/(1×80)

Q=38640J